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POUpdate record using instead of trigger in sql server
 

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  1. POUpdate record using instead of trigger in sql server
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    <p>I have trigger in sql server 2005 which checks for duplicate record and then update the record.</p> <pre><code>USE [CheckeCon] GO SET ANSI_NULLS ON GO SET QUOTED_IDENTIFIER ON GO ALTER TRIGGER [dbo].[tgUserRoleExistForUpdate] ON [dbo].[Sec_UserRoles] INSTEAD OF Update AS declare @UserRoleId int, @UserId int,@RoleId int, @FromDate datetime,@ToDate datetime,@CntlCreatedBy nvarchar,@CntlModifiedAt nvarchar,@CntlCurLockNo smallint; select @UserRoleId=i.UserRoleId from inserted i; select @UserId=i.UserId from inserted i; select @RoleId=i.RoleId from inserted i; select @FromDate=i.FromDate from inserted i; select @ToDate=i.ToDate from inserted i; select @CntlCreatedBy=i.CntlCreatedBy from inserted i; select @CntlModifiedAt=i.CntlModifiedAt from inserted i; select @CntlCurLockNo=i.CntlCurLockNo from inserted i; BEGIN -- BEGIN TRAN IF NOT EXISTS ( SELECT * FROM Sec_UserRoles SEUR JOIN inserted i ON SEUR.RoleId = i.RoleId AND SEUR.UserId = i.UserId Where i.FromDate BETWEEN SEUR.FromDate AND SEUR.ToDate ) Update Sec_UserRoles Set UserId = @UserId,RoleId = @RoleId,FromDate = @FromDate,ToDate = @ToDate, CntlCreatedBy = @CntlCreatedBy,CntlModifiedAt = @CntlModifiedAt,CntlCurLockNo = @CntlCurLockNo Where UserRoleId = @UserRoleId --Commit; Else RAISERROR('User Role Association Already Present',15,1); --ROLLBACK; End </code></pre> <p>But the problem is that it can not update record only raised error which i given in trigger. how can i update record using trigger?</p> <p>Thanks in advanced.</p>
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    1. USMonaliJ
    1. USMonaliJ
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    1. COYour code just assumes that the trigger will be called once for each row. This is **not** the case in SQL Server. If your `UPDATE` statement affects multiple rows, the trigger will be called **once for the statement** and your `Inserted` pseudo table will contain **multiple rows** - so your assignments here `select @UserRoleId = i.UserRoleId from inserted i;` will just assign an arbitrary value from the `Inserted` table and ignore all other rows in `Inserted` ....
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      1. POUpdate record using instead of trigger in sql server
      1. USmarc_s
    2. CONo, no, no, no, no, no, NO. `inserted` can contain, 0, 1, or multiple rows. All of those `select @scalarvariable=...` statements might select values from *different* rows. And for your `IF EXISTS` test, there may be *some* rows for which the existence test returns true, and *some* rows for which it's false.
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      1. POUpdate record using instead of trigger in sql server
      1. USDamien_The_Unbeliever
 

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